[Veritas-ha] Multiple commands of vxevac

[Boddula, Shashi Kanth (HP-SW-LIT)]

VXVM 5.0.1 on HP-UX 11i v3.

I have a volume which occupied in multiple disks, and I want relocate the volumes to the newly added disks.

Since one vxevac command (moving volumes from one old disk to a new disk) taking very long time to complete, I want to run multiple vxevac commands to run in parallel to move the volumes from all old disks to new disks.

I just want to understand whether running multiple vxevac commands in parallel is OK to proceed with, or it should must be in serial way of moving one old disk one by one?


Thanks & Regards,
Shashi Kanth

[Gene Henriksen]

Vxevac mirrors the data from one disk to another. You can run multiple mirror operations simultaneously. You could also select to mirror volumes to new disks then remove the plexes from the old disks. Or, with VEA, you can lo

[Colin]

If the mirror/evac operation is impacting application performance, you can use vxtask to throttle the operation or pause it entirely.

vxtask set slow=<delay> <taskid>

This can cause the operation to take a lot longer (days/weeks), but as stated before its the gold standard.

Sent via PDA. Please excuse brevity or typos.

Vxevac mirrors the data from one disk to another. You can run multiple mirror operations simultaneously. You could also select to mirror volumes to new disks then remove the plexes from the old disks. Or, with VEA, you can look at the disk group and select the Disk View. From here you can drag and drop the sub disks from one disk to another (it uses vxevac).
The only problem may be flooding the SAN with IO and making your system run slowly.
Date: Wednesday, December 12, 2012 9:31 AM
Subject: [Veritas-ha] Multiple commands of vxevac
VXVM 5.0.1 on HP-UX 11i v3.
I have a volume which occupied in multiple disks, and I want relocate the volumes to the newly added disks.
Since one vxevac command (moving volumes from one old disk to a new disk) taking very long time to complete, I want to run multiple vxevac commands to run in parallel to move the volumes from all old disks to new disks.
I just want to understand whether running multiple vxevac commands in parallel is OK to proceed with, or it should must be in serial way of moving one old disk one by one?
Thanks & Regards,
Shashi Kanth
_______________________________________________
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha

[Colin]

PS while you can run them in parallel, consider the underlying geometry.

Parallel reads or writes to/from LUNs composed of the same spindles (eg, target LUNs are all striped across the same spindles, or share spindles with the source LUNs) is just going to lead to a lot of thrashing. You're much better off in that case running the subdisk evacs serially.

Sent via PDA. Please excuse brevity or typos.

Vxevac mirrors the data from one disk to another. You can run multiple mirror operations simultaneously. You could also select to mirror volumes to new disks then remove the plexes from the old disks. Or, with VEA, you can look at the disk group and select the Disk View. From here you can drag and drop the sub disks from one disk to another (it uses vxevac).
The only problem may be flooding the SAN with IO and making your system run slowly.
Date: Wednesday, December 12, 2012 9:31 AM
Subject: [Veritas-ha] Multiple commands of vxevac
VXVM 5.0.1 on HP-UX 11i v3.
I have a volume which occupied in multiple disks, and I want relocate the volumes to the newly added disks.
Since one vxevac command (moving volumes from one old disk to a new disk) taking very long time to complete, I want to run multiple vxevac commands to run in parallel to move the volumes from all old disks to new disks.
I just want to understand whether running multiple vxevac commands in parallel is OK to proceed with, or it should must be in serial way of moving one old disk one by one?
Thanks & Regards,
Shashi Kanth
_______________________________________________
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha

[<Boddula>, "Shashi Kanth (HP-SW-LIT)" <ma=]

The only problem may be flooding the SAN with IO and making your system run slowly.

From: <Boddula>, "Shashi Kanth (HP-SW-LIT)" <shashi-***@hp.com<mailto:shashi-***@hp.com>>
Date: Wednesday, December 12, 2012 9:31 AM
To: "veritas-vx-***@mailman.eng.auburn.edu<mailto:veritas-vx-***@mailman.eng.auburn.edu>" <veritas-vx-***@mailman.eng.auburn.edu<mailto:veritas-vx-***@mailman.eng.auburn.edu>>, "veritas-***@mailman.eng.auburn.edu<mailto:veritas-***@mailman.eng.auburn.edu>" <veritas-***@mailman.eng.auburn.edu<mailto:veritas-***@mailman.eng.auburn.edu>>, "veritas-***@mailman.eng.auburn.edu<mailto:veritas-***@mailman.eng.auburn.edu>" <veritas-***@mailman.eng.auburn.edu<mailto:veritas-***@mailman.eng.auburn.edu>>
Subject: [Veritas-ha] Multiple commands of vxevac

VXVM 5.0.1 on HP-UX 11i v3.

I have a volume which occupied in multiple disks, and I want relocate the volumes to the newly added disks.

Since one vxevac command (moving volumes from one old disk to a new disk) taking very long time to complete, I want to run multiple vxevac commands to run in parallel to move the volumes from all old disks to new disks.

I just want to understand whether running multiple vxevac commands in parallel is OK to proceed with, or it should must be in serial way of moving one old disk one by one?


Thanks & Regards,
Shashi Kanth

--_000_CCEE008928A2genehenriksensymanteccom_
Content-Type: text/html; charset="us-ascii"
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<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>Vxevac mirrors the data from one disk to another. You can run multiple mirror operations simultaneously. You could also select to mirror volumes to new disks then remove the plexes from the old disks. Or, with VEA, you can look at the disk group and select the Disk View.

[c***@sorint.it]

Hi
I think the best and secure way to migrate the disks is by using mirror.
You can add mirror to the volume by selecting the new disk for the second
plex. When the mirror is completed and aligned you can remove the old plex
(old disks)
All without causing disruption
That's all

Bye
Claudio

VXVM 5.0.1 on HP-UX 11i v3.****
** **
I have a volume which occupied in multiple disks, and I want relocate the
volumes to the newly added disks.****
** **
Since one vxevac command (moving volumes from one old disk to a new disk)
taking very long time to complete, I want to run multiple vxevac commands
to run in parallel to move the volumes from all old disks to new disks.***
*
** **
I just want to understand whether running multiple vxevac commands in
parallel is OK to proceed with, or it should must be in serial way of
moving one old disk one by one?****
** **
** **
Thanks & Regards,****
Shashi Kanth****
_______________________________________________
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-ha